Okay, I’m not sure which of these things I did made it work, but I can do things now. The things I did:
I turned off Lumen in Project Settings. I switched it from virtual shadows to real shadows in Project Settings. Further down on my log it was saying shaders for some files I did not care about were causing other errors, so I went to the whole containing folder in Windows Explorer and deleted it. I turned off the Windows PIX GPU Plugin.
TBH, I think it was the deleting that folder with the shader errors. My guess is conversion to UE5 corrupted those files.